Astronomical spectrographs play an important role in addressing some of the biggest challenges in modern astronomy. One of the most critical components of any spectrograph is its dispersing element, since it determines the resolution and dispersion of the spectrograph, and is typically one of the least efficient optical components of the instrument. The aim of this workshop was to bring together researchers and engineers involved in the design, development and construction of spectroscopic instrumentation, with companies and institutes that produce dispersing elements and associated optical components. The forum provided the opportunity to discuss the scientific needs of future instruments, and to address the technological challenges that will allow the development of new types of dispersing elements in the coming years.